Jmx

Yesterday I took the SpringSource Certified Spring 3.0 Professional exam and passed it successfully with 94%. Below you can find some information about my preparation process, the exam form and the type of questions. So, here we go. Preparation I attended the Spring 3 Core training and described it here. This was the entry point for my learning process. I’ve done a lot of notes during the training, so even after three months, the slides + notes were pretty decent source of knowledge....

Sometimes you need to audit or profile your Java application. The easiest but most intrusive way to do this is to do a bunch of System.out.printlns (which is obviously bad) or to use loggers. After adding a lot of logging statements, your application becomes cluttered with unnecessary boilerplate code. Profiling, instrumentation or method measuring are great examples of cross-cutting concerns that might be nicely solved using AOP (Aspect Oriented Programming.) Basically, it allows you to invoke a certain action upon some defined conditions without the need for changing the instrumented code....